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Hello @klingbeil,
In this case, you must calculate the date directly through an equation.
For example, assuming that fieldname1 is a number field for entering the number of weeks. You can insert a calculated field in the form and enter the equation:
(function(){
var current_year = YEAR(TODAY()),
first_day_year="01/01/"+current_year,
days_interval = fieldname1*7;
return GETDATETIMESTRING(DATETIMESUM(first_day_year, 'dd/mm/yyyy', days_interval, 'd'), 'dd/mm/yyyy');
})()Learn more about the date/time operations module by reading the following section in the plugin documentation:
https://cff.dwbooster.com/documentation#datetime-module
Best regards.